KR20020032845A - Method realization for compatibility test between satellite and mission and control element - Google Patents

Method realization for compatibility test between satellite and mission and control element Download PDF

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KR20020032845A
KR20020032845A KR1020000063551A KR20000063551A KR20020032845A KR 20020032845 A KR20020032845 A KR 20020032845A KR 1020000063551 A KR1020000063551 A KR 1020000063551A KR 20000063551 A KR20000063551 A KR 20000063551A KR 20020032845 A KR20020032845 A KR 20020032845A
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satellite
control system
stb
compatibility
software
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KR1020000063551A
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Korean (ko)
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정대원
김학정
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장근호
한국항공우주연구원
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/06—Testing, supervising or monitoring using simulated traffic
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00—Arrangements for monitoring or testing data switching networks
    • H04L43/08—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
    • H04L43/0805—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters by checking availability
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/04—Large scale networks; Deep hierarchical networks
    • H04W84/06—Airborne or Satellite Networks

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Astronomy & Astrophysics (AREA)
  • General Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Selective Calling Equipment (AREA)
  • Radio Relay Systems (AREA)

Abstract

PURPOSE: A method for testing the compatibility between a satellite and a control system is provided to confirm the compatibility using an STB by producing a satellite before the satellite is directly produced, by verifying whether a flight software mounted to the satellite is suitable, and by verifying whether the software mounted is properly operated. CONSTITUTION: A control system is combined with an STB(Software Test Bed). The compatibility between the control system and a satellite is executed. A conversion software matches the control system with the satellite's protocol. The conversion software converts a telecommand packet transmitted from the control system into a CTLU packet. In addition, the conversion software receives a telemetering frame from the STB and makes the telemetering frame in a necessary form after removing a sync and a tail part. After that, the conversion software transmits the telemetering frame to the control system.

Description

위성과 관제시스템간의 호환성 시험방법{Method realization for compatibility test between satellite and mission and control element}{Method realization for compatibility test between satellite and mission and control element}

본 발명은 위성과 그 위성을 운용하는 관제시스템간의 호환성을 확인하기 위한 기술적 방법에 관한 것으로, 위성을 직접 제작하기 전 단계에 제작하여 위성에 탑재되는 비행 소프트웨어가 적합한지, 탑재된 후 제대로 동작하는지 등을 검증하는 STB(Software Test Bed)를 이용하여 호환성을 확인하는 것이다.The present invention relates to a technical method for confirming the compatibility between a satellite and a control system that operates the satellite. This is to check compatibility using the STB (Software Test Bed) that verifies.

관제시스템은 개발 요구 조건에 따라 각각 만들어지고 서브시스템 (subsystem)시험, 시스템(system)시험을 수행하여 시스템의 요구 조건, 성능 및 이상 상태를 확인하며, 또한 개발 요구 조건에 따라 각각 만들어진 위성 시스템도 서브시스템시험, 시스템시험을 수행하여 시스템의 요구 조건, 성능 및 이상 상태를 확인한다.The control system is made in accordance with the development requirements and performs subsystem tests and system tests to check the requirements, performance and abnormal conditions of the system. Perform subsystem tests and system tests to verify system requirements, performance, and fault conditions.

이와 같이 위성과 관제시스템은 각각의 검증을 하지만 두 개의 시스템이 결합했을 때 통신 장비와 방법의 호환성, 원격명령(telecommand)과 텔레메트리 (telemetry)의 호환성, 임무 계획의 설정과 임무 자료 획득의 호환성 여부는 별도의 시험으로 확인하여야 하며, 관제시스템이 위성을 제대로 운영할 수 있느냐는 위성을 발사하기에 앞서 확인하여야 한다.Thus, the satellite and control systems verify each other, but when the two systems combine, the compatibility of communication equipment and methods, the compatibility of telecommand and telemetry, the establishment of mission plans and the acquisition of mission data Compatibility should be checked by a separate test and the control system is to be able to operate the satellite properly before launching the satellite.

위성과 관제시스템을 직접 연결해서 실시하는 호환성 시험은 최종 종단시험으로 발사 전에 일부 준비되어지지만 이러한 종단시험은 위성을 이용할 수 있는 시간의 제약과 잘못된 명령으로 인하여 위성에게 직접적인 충격을 가할 수 있다는 제약 때문에 제한적인 시험만을 수행할 수밖에 없다.The compatibility test, which directly connects the satellite and the control system, is partly prepared before launch as a final test, but this test is due to the limited time available to the satellite and the direct impact on the satellite due to incorrect commands. Only limited tests can be performed.

본 발명은 위성과 관제시스템을 직접 연결해서 실시하는 시험이 위성을 이용할 수 있는 시간의 제약과 잘못된 명령으로 인하여 위성에게 직접적인 충격을 가할 수 있다는 제약 때문에 제한적인 시험만을 수행할 수밖에 없었던 문제를 해결하기 위한 것으로, 위성을 직접 제작하기 전 단계에 제작하여 위성에 탑재되는 비행 소프트웨어가 적합한지 탑재된 후 제대로 동작하는지 등을 검증하는 STB(Software Test Bed)를 이용하여 호환성을 확인하도록 한 것이다.The present invention solves the problem that only a limited test can be performed due to the constraint that the test performed by directly connecting the satellite and the control system can directly impact the satellite due to the limitation of time to use the satellite and the wrong command. This is to check the compatibility by using the STB (Software Test Bed) that verifies whether the flight software installed on the satellite is suitable and operated properly after being mounted before the satellite is manufactured.

이러한 본 발명은 관제시스템과 STB를 결합하여 관제시스템과 위성간의 호환성 시험을 실행하되 관제시스템과 위성의 프로토콜을 맞추어주고 관제시스템에서 오는 원격명령패킷을 CTLU 패킷으로 변환시키며 STB에서 오는 원격측정프레임을 수신하여 sync, tail 부분을 제거한 후 필요한 형태로 만들어 관제시스템에 전송하는 컨버젼 소프트웨어(Conversion software)를 이용함으로써 이루어진다.The present invention combines the control system and the STB to perform the compatibility test between the control system and the satellite, but to match the protocol of the control system and the satellite, converts the remote command packet from the control system into CTLU packets, and the telemetry frame from the STB This is done by using the conversion software which receives the sync, tail and removes it to the required form.

도 1 은 관제시스템의 원격명령 형식1 is a remote command format of the control system

도 2 는 관제시스템의 텔레메트리 형식2 is a telemetry type of control system

도 3 은 본 발명 컨버젼 소프트웨어의 원격명령 형식3 is a remote command format of the conversion software of the present invention

도 4 는 STB 에서 받는 텔레메트리 형식4 is a telemetry format received from STB

도 5 는 STB 와 관제시스템을 포함한 본 발명인 컨버젼 소프트웨어의 구성환경도5 is a configuration diagram of the conversion software of the present invention including an STB and a control system;

관제시스템 중 위성과의 통신을 위해서 필수적인 것은 텔레메트리 모니터링(telemetry monitoring)과 원격명령 변환(telecommand transmission)부분으로, 텔레메트리 모니터링은 위성에서 내려오는 상태 자료를 화면에 구성해서 나타내어 주며, 원격명령 변환은 위성으로 원격명령을 보내는 부분이다.The essential part of the control system for communication with the satellite is telemetry monitoring and telecommand transmission. Telemetry monitoring displays the state data coming from the satellite on the screen. Command translation is the part of sending remote commands to satellites.

관제 시스템에서 원격명령을 위해서 사용되는 형태는 국제적으로 사용된 CCSDS(Consultative Committee for Space Data System)에 정의된 형태를 나타내며 도 1 과 같이 구성된다.The form used for the remote command in the control system represents a form defined in the International Committee for Space Data System (CCSDS) used internationally and is configured as shown in FIG. 1.

그리고 관제시스템에서 받는 텔레메트리는 MODEM/BB 장비 운영 소프트웨어인 cortex NT의 sync.와 tail 인 체크코드(check code)를 포함한 형태로써 도 2 에 도시된 바와 같다.The telemetry received from the control system includes a sync. And tail check code of cortex NT, a MODEM / BB equipment operating software, as shown in FIG. 2.

본 발명에서의 STB는 위성을 직접 제작하기 전 단계에 제작하는 것으로, 위성에 탑재되는 비행소프트웨어가 적합한지, 탑재된 후 제대로 동작하는 지 등을 검증하기 위하여 제작되고 모든 검증을 마친 STB는 태양전지(solararray), 모멘텀 휠 등 직접 움직이는 부분을 제외하고 위성과 동일한 기능을 구현하므로 STB는 위성과 동일한 기능을 수행한다고 할 수 있다.In the present invention, the STB is manufactured before the satellite is directly manufactured, and the STB is manufactured to verify whether the flight software mounted on the satellite is suitable or whether it operates properly after being mounted. STBs perform the same functions as satellites, except for direct moving parts such as solarrarray and momentum wheels.

STB는 일반적인 위성의 경우 소프트웨어와 일부 하드웨어로 구성되며, 특히 KOMPSAT(KOrea Multi Purpose SATellite) 위성의 경우는 OBC(On Board Computer), RDU(Remote Drive Unit), ECU(EPS Control Unit)를 포함한 하드웨어와 소프트웨어로 구성된다.The STB consists of software and some hardware for a typical satellite, especially for KOMPSAT (KOrea Multi Purpose SATellite) satellites, including hardware including an on board computer (OCC), a remote drive unit (RDU), and an EPS control unit (ECU). It consists of software.

STB는 위성을 에뮬레이션하며, 실제 위성체와 틀린 부분은 자세 제어계 등의 구동 부분과 센서 부분, OBC의 TISL(Transponder Input Selection Logic)과 1553 B bus 등이며, 각 STB 내의 장비간 연결은 PC 의 RS-232C 직렬통신 포트를 이용한다.The STB emulates satellites, and the difference between the actual satellite and the satellites is the driving and sensor parts of the attitude control system, the OBC's Translator Input Selection Logic (TISL) and the 1553 B bus, and the connection between the devices within each STB is the RS- of the PC. Use the 232C serial communication port.

본 발명의 컨버젼 소프트웨어는 위성 시스템인 STB와 관제시스템을 연결해 주는 장비로 프로토콜, CLTU, CADU 부분을 호환하게 해 주며 PC 상에서 소프트웨어로 구현된다.The conversion software of the present invention is a device that connects the satellite system STB and the control system to make the protocol, CLTU, and CADU compatible, and is implemented in software on a PC.

프로토콜의 경우는 관제시스템의 TCP/IP와 STB 의 RS-232C를 호환하게 하여 주고, 원격 명령의 경우는 MODEM/BB 의 cortex NT 기능을 대신 수행하는 것과 코드블록상태(code block status)를 추가하는 것이며, 원격 측정의 경우는 위성에서 내려오는 CADU의 header 와 tail 부분을 자른 후 cortex NT 의 header와 tail을 붙여서 관제시스템으로 보내 주는 것이다.In case of protocol, it makes TCP / IP of control system and RS-232C of STB compatible. In case of remote command, it performs the cortex NT function of MODEM / BB and adds code block status. In the case of telemetry, it cuts the header and tail of CADU coming from satellite and attaches the header and tail of cortex NT to the control system.

컨버젼 소프트웨어는 원격 명령의 경우 도 3 의 음영이 있는 부분을 생성하며, 여기서 ECC는 에러 체킹 코드(Error Checking Code)를 의미하며, 실제 값은 F5h(H/W special command), 05h(start codeblock), A5h(continue codeblock), A0h(ECC failure)가 있으며 상황에 따라서 컨버젼 소프트웨어가 이를 만든다.The conversion software generates the shaded portion of Figure 3 for the remote command, where ECC stands for Error Checking Code and the actual values are F5h (H / W special command) and 05h (start codeblock). , A5h (continue codeblock), A0h (ECC failure), and the conversion software makes this for you.

컨버젼 소프트웨어는 원격 측정의 경우 STB에서 도 4 와 같은 텔레메트리를받아서 satellite sync.와 tail을 자른 뒤 도 2 에 표시되어 있는 cortex NT의 sync.와 tail을 붙여서 관제시스템으로 전송하게 된다.In the case of telemetry, the conversion software receives telemetry as shown in FIG. 4 from the STB, cuts the satellite sync. And tail, and attaches the cortex NT sync. And tail shown in FIG. 2 to the control system.

본 발명의 구현을 위해 STB와 관제시스템을 포함한 컨버젼 소프트웨어의 구성 환경은 도 5 에 도시된 바와 같다.The configuration environment of the conversion software including the STB and the control system for implementing the present invention is as shown in FIG.

이와 같이 본 발명은 STB를 이용함으로써 위성체에 직접 영향을 주지 않는 시험 환경에서 위성체에서 수행되는 것과 같은 시험 결과를 얻을 수 있는 이점이 있으며, 위성과 관제시스템을 직접 연결하는 최종 종단시험기간 중에서도 이상 사항이 발생하면 수정 후 바로 위성체에 대해서 시험하지 않고 STB를 이용하여 미리 시험을 수행할 수 있는 효과가 있다.As described above, the present invention has the advantage of obtaining the same test results as those performed in the satellite in a test environment that does not directly affect the satellite by using the STB. If this occurs, there is an effect that can be performed in advance by using the STB without testing the satellite immediately after the modification.

그리고 STB를 이용하면 관제국 운영자의 교육에도 활용될 수 있으며, 위성이 궤도상에서 운영시 지상에서의 명령을 검증할 때도 사용가능 하다.The STB can also be used to train control station operators, and can be used to verify ground commands when satellites operate in orbit.

또한, 본 연구소의 차기 개발 위성인 KOMPSAT2 위성과 KOMPSAT2 관제시스템간의 시험에서도 본 컨버젼 소프트웨어를 이용하여 상기의 효과를 거둘 수 있다.In addition, the conversion software can be used to test the effects between the KOMPSAT2 satellite and the KOMPSAT2 control system.

Claims (1)

관제시스템과 STB를 결합하여 관제시스템과 위성간의 호환성 시험을 실행하되 관제시스템과 위성의 프로토콜을 맞추어주고 관제시스템에서 오는 원격명령패킷을 CTLU 패킷으로 변환시키며 STB 에서 오는 원격측정프레임을 수신하여 sync, tail 부분을 제거한 후 필요한 형태로 만들어 관제시스템에 전송하는 컨버젼 소프트웨어(Conversion software)를 이용하여 위성과 관제시스템간의 호환성을 시험하는 것을 특징으로 하는 위성과 관제시스템간의 호환성 시험방법.It combines the control system and STB to execute the compatibility test between the control system and the satellite, matching the protocol between the control system and the satellite, converts the remote command packet from the control system into CTLU packets, receives the telemetry frame from the STB, Test method for compatibility between satellite and control system, characterized by testing the compatibility between satellite and control system by using the conversion software to remove the tail and make it into the required form and transmitting it to the control system.
KR1020000063551A 2000-10-27 2000-10-27 Method realization for compatibility test between satellite and mission and control element KR20020032845A (en)

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CN106027137A (en) * 2016-05-25 2016-10-12 西安航天恒星科技实业(集团)公司 Multi-satellite compatible satellite remote sensing ground receiving and processing system and method thereof

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KR100435495B1 (en) * 2001-11-21 2004-06-09 한국전자통신연구원 system for managing the task of satalite, satalite control system and method using the managing system
CN106027137A (en) * 2016-05-25 2016-10-12 西安航天恒星科技实业(集团)公司 Multi-satellite compatible satellite remote sensing ground receiving and processing system and method thereof
CN106027137B (en) * 2016-05-25 2019-04-09 西安航天恒星科技实业(集团)公司 The compatible satellite remote sensing ground receiver processing method of more stars

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